1 //===- Timer.h ----------------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLD_COMMON_TIMER_H 10 #define LLD_COMMON_TIMER_H 11 12 #include "llvm/ADT/DenseMap.h" 13 #include "llvm/ADT/StringRef.h" 14 #include <assert.h> 15 #include <chrono> 16 #include <map> 17 #include <memory> 18 19 namespace lld { 20 21 class Timer; 22 23 struct ScopedTimer { 24 explicit ScopedTimer(Timer &t); 25 26 ~ScopedTimer(); 27 28 void stop(); 29 30 Timer *t = nullptr; 31 }; 32 33 class Timer { 34 public: 35 Timer(llvm::StringRef name, Timer &parent); 36 37 static Timer &root(); 38 39 void start(); 40 void stop(); 41 void print(); 42 43 double millis() const; 44 45 private: 46 explicit Timer(llvm::StringRef name); 47 void print(int depth, double totalDuration, bool recurse = true) const; 48 49 std::chrono::time_point<std::chrono::high_resolution_clock> startTime; 50 std::chrono::nanoseconds total; 51 std::vector<Timer *> children; 52 std::string name; 53 Timer *parent; 54 }; 55 56 } // namespace lld 57 58 #endif 59